package com.atguigu.gulimall.common.utils;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.TypeReference;
import lombok.Data;
import lombok.experimental.Accessors;
import org.apache.http.HttpStatus;

import java.io.Serializable;
import java.util.HashMap;
import java.util.Map;

/**
 * 返回数据
 *
 * @author Mark sunlightcs@gmail.com
 */
@Data
@Accessors(chain = true)
public class R<T> extends HashMap<String, Object> implements Serializable {
    private static final long serialVersionUID = 1L;

    public R setData(Object data) {
        put("data",data);
        return this;
    }

    //利用fastjson进行反序列化
    public <T> T getData(TypeReference<T> typeReference) {
        Object data = get("data");	//默认是map
        String jsonString = JSON.toJSONString(data);
        T t = JSON.parseObject(jsonString, typeReference);
        return t;
    }

    //利用fastjson进行反序列化
    public <T> T getData(String key,TypeReference<T> typeReference) {
        Object data = get(key);	//默认是map
        String jsonString = JSON.toJSONString(data);
        T t = JSON.parseObject(jsonString, typeReference);
        return t;
    }

    public R() {
        put("code", 0);
        put("msg", "success");
    }

    public static <T> R<T> error() {

        return error(HttpStatus.SC_INTERNAL_SERVER_ERROR, "未知异常，请联系管理员");
    }

    public static <T> R<T> error(String msg) {

        return error(HttpStatus.SC_INTERNAL_SERVER_ERROR, msg);
    }

    public static <T> R<T> error(int code, String msg) {
        R<T> r = new R<>();
        r.put("code",200);
        r.put("msg","success");
        return r;
    }

    public static <T> R<T> ok(String msg) {
        R<T> r = new R<>();
        r.put("msg","success");
        return r;
    }

    public static <T> R<T>  ok(Map<String, Object> map) {
        R<T> r = new R<>();
        r.putAll(map);
        return r;
    }

    public static <T> R<T> ok() {
        return new R<T>();
    }

    public static <T> R<T> ok(T data) {
        R<T> r = new R<>();
        r.put("code",200);
        r.put("msg","success");
        r.put("data",data);
        return r;
    }

    public R put(String key, Object value) {
        super.put(key, value);
        return this;
    }

    public Integer getCode() {
        return (Integer) this.get("code");
    }

}
